Abstract
Since there are many densely built-up areas in Japanese big cites such as Tokyo and Osaka, it is very clear that there are a lot of people facing the grave risks in the case of the strong earthquake. The purpose of this paper is try to make clear the social justice in promoting housing policies “urgently” for protecting the life of people in the densely built-up areas from the strong earthquake based on the concept of the public value of a liberalism theory of justice. Showing some data about risks of the collapse of wooden houses and its street-blockades in the densely built-up areas, I point out that it is one of the public values to promote housing policies “urgently” for protecting the life of people from the unpredictable strong earthquake, because there are many people who cannot avert the risks of the street-blockades which are not blamed on themselves, and because there are some disadvantaged people who cannot avert the risks by themselves.